Update notes for submitted changes

* Log stack trace if CachingKeyPairProvider hits unexpected exception

97/e660e1a54b2bae4b5e830ad45c3d7b9ea9ea21

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+Verified+1: JGit Bot <jgit-bot@eclipse.org>
+Code-Review+2: Thomas Wolf <thomas.wolf@paranor.ch>
+Code-Review+2: David Pursehouse <david.pursehouse@gmail.com>
+Submitted-by: David Pursehouse <david.pursehouse@gmail.com>
+Submitted-at: Wed, 20 May 2020 22:49:02 -0400
+Reviewed-on: https://git.eclipse.org/r/163321
+Project: jgit/jgit
+Branch: refs/heads/master